日常生活中的科学
Why does ice float?
Water is bent rather than linear, so its bond dipoles do not cancel and the molecule is polar.
→
简短答案
Water is bent rather than linear, so its bond dipoles do not cancel and the molecule is polar.
真正发生了什么？
Table salt is not made of isolated NaCl molecules in the solid; it forms an extended ionic lattice.
一个有用的直观图景
→
Water is unusual: its hydrogen-bonded solid structure is more open than liquid water, so ordinary ice is less dense and floats.